Nouns denoting natural phenomena

coordinate bond
a covalent bond in which both electrons are provided by one of the atoms
atmospheric moisture or dust or smoke that causes reduced visibility
alluvial fan
a fan-shaped deposit where a fast flowing stream flattens out
a wind from the northwest
(meteorology) the atmospheric phenomenon created at the boundary between two different air masses
systolic pressure
the blood pressure (as measured by a sphygmomanometer) during the contraction of the left ventricle of the heart
alternation of generations
the alternation of two or more different forms in the life cycle of a plant or animal
gamma radiation
electromagnetic radiation emitted during radioactive decay and having an extremely short wavelength
the lagging of an effect behind its cause; especially the phenomenon in which the magnetic induction of a ferromagnetic material lags behind the changing magnetic field
Peruvian current
a cold ocean current that flows north along the Pacific Coast of South America before turning west
infrared ray
a ray of infrared radiation; produces a thermal effect (as from an infrared lamp)
blood pressure
the pressure of the circulating blood against the walls of the blood vessels; results from the systole of the left ventricle of the heart; sometimes measured for a quick evaluation of a person's health
reciprocal reflection between two reflecting surfaces
a wall of water rushing ahead of the flood
an easterly wind in the western Mediterranean area
a ray of artificial ultraviolet light from a sunray lamp
Coriolis force
(physics) a force due to the earth's rotation; acts on a body in motion (airplane or projectile) in a rotating reference frame; in a rotating frame of reference Newton's second law of motion can be made to apply if in addition to the real forces acting on a body a Coriolis force and a centrifugal force are introduced
a cloud of solid or liquid particles in a gas
katabatic wind
a wind caused by the downward motion of cold air
a storm during which hail falls
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